325540666 has 32 divisors (see below), whose sum is σ = 559415808. Its totient is φ = 140635440.

The previous prime is 325540639. The next prime is 325540669. The reversal of 325540666 is 666045523.

325540666 = 2138² + 2139² + ... + 2206².

It is not an unprimeable number, because it can be changed into a prime (325540669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80505 + ... + 84451.

It is an arithmetic number, because the mean of its divisors is an integer number (17481744).

Almost surely, 2^325540666 is an apocalyptic number.

325540666 is a deficient number, since it is larger than the sum of its proper divisors (233875142).

325540666 is a wasteful number, since it uses less digits than its factorization.

325540666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4146.

The product of its (nonzero) digits is 129600, while the sum is 37.

The square root of 325540666 is about 18042.7455227856. The cubic root of 325540666 is about 687.9154802541.

The spelling of 325540666 in words is "three hundred twenty-five million, five hundred forty thousand, six hundred sixty-six".